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Contains HBase row and column filter assembly logic.
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HBase filters may be collected into lists using <a href="http://hbase.apache.org/apidocs/org/apache/hadoop/hbase/filter/FilterList.html" target="#">FilterList</a> 
each with a 
<a href="http://hbase.apache.org/apidocs/org/apache/hadoop/hbase/filter/FilterList.Operator.html#MUST_PASS_ALL" target="#">MUST_PASS_ALL</a> or <a href="http://hbase.apache.org/apidocs/org/apache/hadoop/hbase/filter/FilterList.Operator.html#MUST_PASS_ONE" target="#">MUST_PASS_ONE</a>
 (logical) operator. Lists may then be assembled into hierarchies 
used to represent complex expression trees filtering either rows
or columns in HBase.
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